Amitabh Bachchan turns a year older today. The megastar who had a gala bash last year seems to be a bit mellow this time around. Big B who has spent over four decades in Bollywood is showered with bir

Several B-town celebrities took on to Twitter to wish the megastar on his 71st birthday

Amitabh Bachchan turns a year older today. The megastar who had a gala bash last year seems to be a bit mellow this time around. Big B who has spent over four decades in Bollywood is showered with birthday wishes from all the corners of the world.

Apart from his fans, Bollywood too is sending in birthday wishes for the star via social networking sites. Take a look at what the celebs tweeted.